GENERAL CIRCULATION OF THE PACIFIC OCEAN 



52,9 



Thus the third term in (35) now becomes approximately 



_ cos </, 3^1 _ _ 3V3 d-i^i 



~~ZnR dx' 



X 



R dx 

 Substituting (30), (32), (34) and (37) in (35) , we have 



1 d'N,, 1 rfW„ 



27VT;- -^A^. (9) + N^ (a; v)j^-^ 



(37) 



D^ 



27r2 



(-1) 



1 



\m 



R^~ 





1 (i=M„ 



1 1 y rfw„ 



p(^ R^ m " d,^2 



(38) 



(27ri2/3) ' ^^^^ 



so that the ocean is supposed to be bounded by the meridians of 0° 



and 120°, and the western and eastern boundaries are given by A = 



and A = 1 respectively. 



d^M d^M 



Now it is possible to express — ^^ and — ^ — !^ in terms of Mm («^) , 



dy^ 



dy' 



or 



and 



dy^ 



dm^ 



dy" 



i 



(40) 



Substituting (40) in (38) we have 



d'N^ ^ 9 d^K 



dx-' ~S "4^R^ Ity 



3V3 

 " 277 dN^ . ^ / „2 



Yn d>r 



3 



SI D] 81 



(41) 



